Question about Block 5: do we know how many COPVs are in the upper stage?

IIRC, AMOS 6's failure was partially attributed to higher pressures in the COPVs. There was speculation (perhaps it was established) that SpaceX had attempted to reduce the number of COPVs by one, ostensibly to save weight, with the remaining COPVs picking up the slack. After the pad incident, SpaceX returned to its previous COPV configuration.

First: do I have this right? Second: if so, does COPV 2.0 allow for a return to fewer and/or more highly-pressurized bottles?

Nope, same diameter. (see image) Don't be fooled by the racetracks that add apparent (but not real) diameter.

When are people going to stop doing attempted image analysis on tiny JPEGs with terrible compression?

Probably at the same time people stop using similarly terrible images for the counterpoint.

? You might want to schedule an appointment with an optician.

So you stand by your belief?

No, I don't stand by it, I was trying to make a joke. It looks like the original image's appearance is an artifact caused by an unresolved, smaller raceway at the "top" of the vehicle in its horizontal orientation.